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https://issues.apache.org/jira/browse/KAFKA-2127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14497570#comment-14497570
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Jason Rosenberg commented on KAFKA-2127:
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the ip's that show in the 'Closing socket' and 'Connection reset' log lines
appear to be random hosts in our deployment, hosts which produce messages to
kafka, but are otherwise not part of the kafka deployment.
> Running TopicCommand --alter causes connection close/reset errors in kafka
> logs
> -------------------------------------------------------------------------------
>
> Key: KAFKA-2127
> URL: https://issues.apache.org/jira/browse/KAFKA-2127
> Project: Kafka
> Issue Type: Bug
> Reporter: Jason Rosenberg
> Priority: Minor
>
> I am using 0.8.2.1. I've been noticing that any time I use TopicCommand to
> alter a topic (e.g. add partitions) or delete a topic, the broker logs show a
> bunch of closed connections, and usually 2 or 3 Connection reset exceptions.
> It logs these with ERROR status.
> I recently used the kafka.admin.TopicCommand tool to increase the partitions
> for a topic from 1 to 4. So I ran:
> {code}
> java -cp kafka.jar kafka.admin.TopicCommand --zookeeper myzkserver:12345
> --topic mytopic --alter --partitions 4
> {code}
> This resulted in the following sequence in the broker log (repeated pretty
> much in the logs of each broker):
> {code}
> 2015-04-16 03:51:26,156 INFO [kafka-network-thread-27330-1]
> network.Processor - Closing socket connection to /1.2.3.12.
> 2015-04-16 03:51:26,169 INFO [kafka-network-thread-27330-0]
> network.Processor - Closing socket connection to /1.2.3.89.
> 2015-04-16 03:51:26,169 INFO [kafka-network-thread-27330-0]
> network.Processor - Closing socket connection to /1.2.3.95.
> 2015-04-16 03:51:26,176 ERROR [kafka-network-thread-27330-2]
> network.Processor - Closing socket for /1.2.4.34 because of error
> java.io.IOException: Connection reset by peer
> at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
> at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
> at sun.nio.ch.IOUtil.read(IOUtil.java:197)
> at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
> at kafka.utils.Utils$.read(Utils.scala:380)
> at
> kafka.network.BoundedByteBufferReceive.readFrom(BoundedByteBufferReceive.scala:54)
> at kafka.network.Processor.read(SocketServer.scala:444)
> at kafka.network.Processor.run(SocketServer.scala:340)
> at java.lang.Thread.run(Thread.java:745)
> 2015-04-16 03:51:26,178 ERROR [kafka-network-thread-27330-1]
> network.Processor - Closing socket for /1.2.4.59 because of error
> java.io.IOException: Connection reset by peer
> at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
> at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
> at sun.nio.ch.IOUtil.read(IOUtil.java:197)
> at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
> at kafka.utils.Utils$.read(Utils.scala:380)
> at
> kafka.network.BoundedByteBufferReceive.readFrom(BoundedByteBufferReceive.scala:54)
> at kafka.network.Processor.read(SocketServer.scala:444)
> at kafka.network.Processor.run(SocketServer.scala:340)
> at java.lang.Thread.run(Thread.java:745)
> 2015-04-16 03:51:26,192 ERROR [kafka-network-thread-27330-1]
> network.Processor - Closing socket for /1.2.3.11 because of error
> java.io.IOException: Connection reset by peer
> at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
> at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
> at sun.nio.ch.IOUtil.read(IOUtil.java:197)
> at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
> at kafka.utils.Utils$.read(Utils.scala:380)
> at
> kafka.network.BoundedByteBufferReceive.readFrom(BoundedByteBufferReceive.scala:54)
> at kafka.network.Processor.read(SocketServer.scala:444)
> at kafka.network.Processor.run(SocketServer.scala:340)
> at java.lang.Thread.run(Thread.java:745)
> 2015-04-16 03:51:26,451 INFO [kafka-request-handler-3]
> server.ReplicaFetcherManager - [ReplicaFetcherManager on broker 45] Removed
> fetcher for partitions [mytopic,2]
> 2015-04-16 03:51:26,453 INFO [kafka-request-handler-3] log.Log - Completed
> load of log mytopic-2 with log end offset 0
> 2015-04-16 03:51:26,454 INFO [kafka-request-handler-3] log.LogManager -
> Created log for partition [mytopic,2] in
> /data_sdd/app/samsa-kafkaserver-ng/kafka_logs_ng with properties
> {segment.index.bytes -> 10485760, file.delete.delay.ms -> 60000,
> segment.bytes -> 1073741824, flush.ms -> 9223372036854775807,
> delete.retention.ms -> 86400000, index.interval.bytes -> 4096,
> retention.bytes -> 50000000000, min.insync.replicas -> 1, cleanup.policy ->
> delete, unclean.leader.election.enable -> true, segment.ms -> 604800000,
> max.message.bytes -> 1000012, flush.messages -> 9223372036854775807,
> min.cleanable.dirty.ratio -> 0.5, retention.ms -> 86400000, segment.jitter.ms
> -> 0}.
> 2015-04-16 03:51:26,454 WARN [kafka-request-handler-3] cluster.Partition -
> Partition [mytopic,2] on broker 45: No checkpointed highwatermark is found
> for partition [mytopic,2]
> 2015-04-16 03:51:26,558 INFO [kafka-network-thread-27330-0]
> network.Processor - Closing socket connection to /1.2.4.34.
> 2015-04-16 03:51:26,658 INFO [kafka-network-thread-27330-0]
> network.Processor - Closing socket connection to /1.2.3.95.
> 2015-04-16 03:51:26,920 INFO [kafka-network-thread-27330-2]
> network.Processor - Closing socket connection to /1.2.4.246.
> 2015-04-16 03:51:26,921 INFO [kafka-network-thread-27330-2]
> network.Processor - Closing socket connection to /1.2.5.4.
> {code}
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